Of sheet-iron



UNITED STATES PATET onirica.

EBENEZER G. POMEROY, OF PITTSBURGH, PENNSYLVANIA.

MANUAGTURE oF SHEET-IRON.

Specific'sation of Letters Patent No. 10,482, dated January 31, 18,54.

To all whom t may concern.'

Be it known that I, EBENEZER G. POM- ERoY, of the city of Pittsburgh,county of Allegheny, Commonwealth of Pennsylvania, have invented anddiscovered a new and useful improvement in the mode of protecting ironfrom oxidation while I beautify its surface by incorporating with suchsurface by mechanical force solid carbonaceous matter; and I do herebydeclare that the following is a true and perfect description of myprocess for accomplishing this result.

I make a paint by grinding plumbago, pulverized charcoal and the blacksoot formed by the'burning of bituminous coal, or other bituminousmatter, along with ivory, or bone, or lamp black, either with Water,weak spirits, vinegar, or any acetous preparation, until the paint isvery fine, and t to be applied, which is done with a soft brush to thesurface of the iron which has been previously cleansed by any of themodes in common use so as to leave a clean surface of iron. When thesurface is completely covered the iron is ready for t-he nextl process,which consists in passing it between rolls substantially -as done inreducing common sheet iron, the result being such a combination of thecarbonaceo-us matter with the surface of the iron as to form a permanentcoating thereupon which will maintain its place under `any of theprocesses of manufacture into articles for use, to which sheet iron isordinarily subjected.

I have found the best and most reliable results to be obtained from theuse of'fplum-f bago, pulverized charcoal, bone black, and soot obtainedfrom burning b1-k tuminous coal or other bituminousv matter, in equalproportions as to volume or bulk, ground together in the medium ofcommon vinegar, to the consistency of white lead when prepared forsecond coating by painters, and that it is also better to heat the ironafter it has been painted before rolling it. But I do not confine myself`to the use of the articles here -named in the combination heresuggested. Good results may be obtained by leaving out some of thearticles mentioned by me.

`The iron to .which I have applied my improvement has been sheet ironand in regard to this article I conceive it to be most useful, but itmay be applied to any iron to which the proper mechanical force may beapplied to produce the necessary combination.

The coating aforesaid is susceptible of a i high degree of polish,which, when desired 'I produce by means of a planishing roll or rolls asfollows, viz. After preparing, coating and-rolling the iron as beforestated, it is then planished by placing the sheets one at a time, upon acast or wrought iron table, or other hard substance, made perfectlysmooth von the surface, and resting on a firm movable foundatio11`,'andof suflicient size to admit of a sheet of the dimensions required, tolay on its surface, as seen in that. part of the drawing accompanyingthis specification, `marked Plate. This plate is movable similar to thebed plate of a slating'niachine, and is fed in a manner similar to thefeeding apparatus of a planing machine, or saw mill. The weightfI/V issupported on one or more rolls of small dimensions and is drawn toandfro by a connecting rod attached `to any-machinery in mot-ion, and iskept parallel and prevented from upsetting by the guides and cross headsG,l G. The weight W is recessed at the to (marked R) for the purpose ofadding greater weight, and which it is intended should t into the recessto prevent slipping.

I have found it most advisable to cleanse the iron and Iapply 'thecoating when the sheet yhas been extended to about one half the lengthintended. o I do not claim the use of the above materials'in combinationas a paint or composition that maybe forced into the surface of iron.But believing that I am the first person who has ever incorporated solidcarbonaceous matter with the surface of iron by mechanical force.

I/Vhat `I do claim as my invention and discovery and desire to secure byLetters Patent is- The incorporating, substantially as herein described,solid carbonaceous matterwith the surface of iron so as to protect itfrom oxidation and beautify it at the same time.

- E. G. POMERO'Y. Witnesses:

SAML. M. LAWDER, THOMAS S. VILLIAMS.

